[etatoby]

Just read Real World Haskell and do all the exercises. After you really understand functor and applicative, and do all the exercises, monad will not be much more complicated.

After you learn the math, that is, the algebraic structure that is called a monad (after, not before) you can watch a few YouTube videos and read some tutorials, until you find the wavy-handy explanation that makes more intuitive sense to you, personally.